Doorknob



' R. A. BBEUL.

DOORKNOB.

APPLICATION FILED OQT. 9. 1919.

' 1,341,969. PatentedJune1Q1920.

I INVENTOI? Specification of Letters Patent.

Patented June 1, 1920.

Application filed October 9, 1919. Serial No. 329,463.

To all whom it may concern:

Be it known that I, RICHARD A. BREUL, a citizen of the United States ofAmerica, and a resident of Bridgeport, county of F airfield, and Stateof Connecticut, have invented a certain new and useful Improvement inDoorknobs, of which the following is a specification.

My invention relates to knobs used in connection with door locks, forthe operation of the latch bolts therein, and while it is useful,practicable, and preferable for the manufacture of such knobs providedwith china, composition, or metal head portions, is specially designedand adapted for the construction of such knobs having head portions madeof transparent or tinted glass.

It is the main object of my invention to 7 construct such door knobs ina manner by which a more preferable, neat, smooth, strong, and reliablearticle may be produced at a smaller expense than present makes, toprovide them with a safeguard against danger of breakage by shock orconcussion, to add to its appearance by the introduction of reflectivematerial, and also by special shaping of the knob base, applied in amanner to be of constructive service.

The principles of my improvement are illustrated in the drawings, inwhich Figure 1 shows a side view of a completed knob according to myinvention, and Fig. 2 represents a like view of the knob I use therein.Fig. 3 is a side view of the knob holding ferrule, and Fig. 4 asectional view of Fig. 2 below line at. Fig. 5 represents a side view ofthe body portion contained within the ferrule, Fig. 6 a bottom viewthereof, and Fig. 7 is a plain disk of packing material.

Referring to the drawings, in which similar characters refer to similarparts throughout the several views, I hereby proceed to describe myinvention:

As shown complete in Fig. 1 of the drawings and the various parts indetail in the other drawings, my improved door knob consists of a sheetmetal cup or ferrule b, a steel or cast metal body part, C, firmlycontained within the central portion 6 and lower end 6" of ferrule b,and the glass knob a, hold in and by the upper portion of the ferrule 72as hereafter described. By various suitable press or cupping operationsa sheet metal blank is formed and drawn to the shape of ferrule I), Fig.3, and

arranged to receive a hollow spindle bushing or cylindrical body, 0,shaped as shown in Figs. 5 and 6, to have a body portion 0 with atoothed or knurled surface, 0', a reduced lower part, 0", and containingan aperture d, therethrough, of a shape and size conforming to the lockspindle, to which it is to be attached. Said knurled body portion 0 isof proper size to be rigidly held within the central portion 1/ offerrule b,

when forced thereinto bypressure, and to strike and rest against thebottom thereof, the aperture d therein conforming to and alining withcl, in and through bushing c.

The upper surface portion of base a of the knob head up to itsconjunction with the neck portion (see Fig. 2) is provided with anannular row of shallow grooves, a, arranged in scallop formation, andalining therewith, a like row of similar grooves, a encircles theadjoining surface of the knob neck. The upper part, 'b, of the ferruleZ) is of proper size to admit and inclose knob base a, and its rimportion is formed by a row of lobe shaped teeth, 6, coinciding in shapeand number with the row of grooves 64 described above. These teeth, (seeFig. 3), are formed with considerable spacing between them, to allowthem to be bent inwardly at right angles over the rounding edge of theknob base (6 contained in the ferrule cup I), and the ends of the teethare {furthermore sufficiently reduced in width, so as to enter into therecesses or grooves of row a, to rest against the bottom and sides ofeach groove in order to prevent any loose action or movement of the knobhead within ,such fastening. These features are properly illustrated inthe sectional view represented in Fig. 4, the shape and arrangement ofthe grooves being shown at one side thereof, while those on the otherside are covered by the inwardly bent teeth of part of row 6 of theferrule.

A concavity, a, in the bottom of the knob material, a disk of very softmetal or of very strong fibrous material, (see 'Fig. 7,) and as shown inits assigned position by f in Flg. 1,

r is interposed below the knob base, and there- [its required depth andposition, and hole 6,

Fig. 2, is drilled all through knob and spindle combined, to bepermanently held together' by pin 6, Fig. 1.

It is obvious that aperture d may be of a different size and shape,according to va rious makes and shapes of knob spindles, and it may thusbe of square shape, or contain a thread for attachment to a threadedspindle, and for such a purpose a set screw of usual size and shape maybe contained in the knob hub and used in place of pin 0.

Having thus explicitly described my invention and explained its purposeand ad 7 portion engaging the knob head base and containing teethembracing and fastening the knob base Within said cup portion.

2. In a door knob a sheet metal ferrule having a hub portion containinga body part by frictional contact, and having a cup shaped portionengaging the knob head base, and a row of teeth extending over andclasping the knob base, in combination With a disk of semiresilientmaterial located between the knob base and the cup bottom.

3. In a door knob a ferrule drawn from sheet metal and having a hubportion inclos ing and holding a knob spindle bushing by frictionalcontact, and a cup portion inclosing and securing the knob head base byteeth on and extending from said cup portion, grooves formed on the knobhead base and containing portions of said teeth.

4;. In a door knob a sheet metal ferrule having a hub portion, a spindlebushing held therein, and a cupped and toothed portion engaging the knobhead base, a concavity in said knob head base containing reflectivematerial, packing material interposed between theknob head base and theferrule and covering the reflective concavity in said base. 7 V

RICHARD A. BREU L.

